In Galicia, Spain, this ritual is called "Caceria del rey Charlo" ("Chase of king Charles") and is still performed. In the past, the inhabitants of Vilanova de Lourenza would chase down a wren and, after tying it to a pole, parade it and show it to the abbot of the local monastery, who would proceed then to offer them food and drink and appoint two leaders of local town council out of the four candidates proposed by the neighbours. This tradition has been recorded since the XVIth century. The sources are somewhat misleading about the date, since they claim it was "New Year`s Day" but it might mean "The day after Christmas", which was regarded back then to signal the end of the year. The wren, in Galicia, is called carrizo (reed).

In the folk
traditions of Greece, Italy, Spain, France, Holland, British Isles, Denmark and
Sweden, the wren is considered king of birds but also is believed to bring bad
luck and harm. As early as the
seventh century, carrizo was considered King when it appeared in one of Aesop's
fables.Plutarch attributes the
fable of the Eagle and the Wren to Aesop, though the story is not found in any
surviving collections of Aesop’s fables.

In the fable, the wren outsmarts the eagle in a race by
riding on its shoulders until right before the finish line, at which point the
wren suddenly flies ahead and wins
the race!Some believe Aesop’s
fable was taken from an ancient Sumarian tale about an elephant and a wren
rivalry. There are various versions of the tale. Grimm has a version of the
tale where the wren creeps into the breast feathers of the eagle and hides. In
another version, the wren rides on the crest feathers of the eagle, and when
the eagle, from the heights, proclaims itself king, the wren objects from its
higher position, challenging the eagle to “come up here!”The eagle is too tired, and the wren is
proclaimed King!

Some versions of the story have the eagle cursing the wren
to never be able to fly higher than the hedges. Others say all the other birds
were disgusted at the wren’s trickery, and since that day have driven the wren
from all open spaces and have forced him to take shelter in the hedges.

According to Elizabeth Lawrence’s book, “Hunting the Wren,”
a Welsh sequel to the fable states the other birds were sorrowful about the
outcome of the contest. They cried bitterly and decided to drown the wren in a
pan full of their tears. This plan, however, was foiled by the owl, who upset
the pan and spilled the tears. The birds then swore vengeance against the owl.
Ever since, he has not dared to go out during the day, but hunts at night when
the other birds are sleeping.Yet
another Welsh story says the wren fell to the ground and was injured during the
contest. The other birds made a broth to cure the wren but again, the
blundering owl upset the pot. Darn that owl!

At any rate, the wren was saved as was the title of King of
the Birds.

What is interesting to me is that in almost every part of
Europe, some form of the contest between the eagle and the wren exists, with
variations in North America and China. Perhaps the legend can be traced back to
Taliesin, a sun god in the British tradition, for whom the wren was a sacred
bird. The wren and eagle can also be found in the Mabinogion, where the wren is
the spirit of the Old Year killed at the Winter Solstice, and the New Year
rises like the eagle. I believe the origins of the story are even more ancient,
and that the Eagle represents Horus, god of the rising and setting sun, god of
the east and sunrise, born at the Winter Solstice. And how dare that dastardly
little wren foil the Sun?!

The wren is surrounded by an aura of sacredness whose
meaning is not easy to understand without some digging into those origins. In Ireland
it is popularly believed that "the robin and the wren are two saints of the Lord. "(The robin and the wren
are God's two holy men). In Cornwall, early last century, the children knew and
recited the following:

“He that hurts a robin or a wren

Will never prosper nor his land”

There are many folk traditions that speak the same warning.
From Sussex and Essex:

“The robin and the wren

Are God Almighty’s cock and hen;

Him that harries their nest,

Never shall his soul have rest.”

And

“Hurt a robin or a wren,

Never prosper, boy or man.”

In Scotland the wren was called the “Lady of Heaven’s hen.”

Despite that veneration, it was a custom in many parts of
Britain and Ireland to kill wrens on December 26. Sometimes it was done by
servants or peasants, sometimes by children, sometimes by mummers. The wren was
murdered and mounted, wings extended, on the top of a long pole, or suspended
by the legs in the center of two hoops set at right angles to each other, or
mounted it in a bush or holly branch.The wren-boys then went from house to house chanting a rhyme and asking
for gifts of food or money. Sometimes the day was concluded by carrying the wee
body to the churchyard and burying it with chanting, singing and dancing.Though it seems cruel, the wren was most
certainly killed because it was a hallowed bird representing the Old Year, the
dying sun.

The tradition of hunting the wren survived in Galicia, northern
Portugal, southern France, England, Wales and Ireland until the middle of last century.
In some villages, it survives
still. Within these ancient
agricultural rites is the attempt to somehow magically stimulate the renewal of
plant and animal life after winter.

In Spain, these and other pagan festivals were censured by
San Paciano, Bishop of Barcelona (circa 370), St. Augustine (circa 400),
Cesareo of Arles (circa 480), and others. However, they were often glossed over
with Christian symbolism and have survived, nearly intact.

Sometimes, it was the priests themselves who brought the
traditions to the locals.The
hunting of the wren in Lourenzá, Spain, according Designed Tomé, was a
tradition that probably came to the monastery of that place with the French
monks.

Some authors assume that the apparent popular antipathy was
demonstrating against these little birds in the vicinity of the winter
solstice, was encouraged by the Church to end, or Christianize, the pagan
tradition.

The sacralization of the wren certainly contrasts with its
year-end ritual slaughter; indicating that popular aversion is most likely the
manifestation distorted by the Church or simply by the passage of time, an ancestral
rite - the primitive sacrifice of
the king - represented here by a bird that acquired its supposed personality
under the beliefs about this rite.

An interesting aside:a 1527 document on the hunt wren in Vilanova de Lourenzá, mentions an
important analysis of the origins of this tradition data. The wren commonly
referred to as Bird King, in the sixteenth century also received the name of
King Charlo. This could have to do
with the former emperor of the Franks, Charlemagne, though there is nothing to prove
(or disprove) that theory. However, considering Charlemagne was the one who led
the observance of the Celtic church to the designs traditional church of Rome,
it’s not out of the question.